<template>
  <el-card>
    <div slot="header"
         class="clearfix">
      <!-- 面包屑内容 -->
      <el-breadcrumb>
        <el-breadcrumb-item to="/home"><i class="el-icon-house"></i>首页</el-breadcrumb-item>
        <el-breadcrumb-item>商品管理</el-breadcrumb-item>
        <el-breadcrumb-item>添加商品</el-breadcrumb-item>
      </el-breadcrumb>
    </div>
    <!-- 提示 -->
    <el-alert title="增加商品"
              type="info"
              center
              show-icon
              :closable="false">
    </el-alert>
    <!-- 步骤条 -->
    <el-steps :space="200"
              :active="activeIndex - 0"
              finish-status="success"
              align-center>
      <el-step title="基本信息"></el-step>
      <el-step title="商品参数"></el-step>
      <el-step title="商品属性"></el-step>
      <el-step title="商品图片"></el-step>
      <el-step title="商品内容"></el-step>
      <el-step title="完成"></el-step>
    </el-steps>
    <!-- 表单区域 -->
    <el-form :model="addForm"
             :rules="addFormRules"
             ref="addFormRef"
             label-width="100px">
      <!-- tab栏区域 -->
      <el-tabs tab-position="left"
               v-model="activeIndex"
               :before-leave="beforeTabLeave"
               @tab-click="tabClicked">
        <el-tab-pane label="基本信息"
                     name="0">
          <!-- 表单控件 -->
          <el-form-item label="商品名称"
                        prop="goods_name">
            <el-input v-model="addForm.goods_name"></el-input>
          </el-form-item>
          <el-form-item label="商品价格"
                        prop="goods_price">
            <el-input v-model="addForm.goods_price"></el-input>
          </el-form-item>
          <el-form-item label="商品重量"
                        prop="goods_weight">
            <el-input v-model="addForm.goods_weight"></el-input>
          </el-form-item>
          <el-form-item label="商品数量"
                        prop="goods_number">
            <el-input v-model="addForm.goods_number"></el-input>
          </el-form-item>
          <el-form-item label="商品分类"
                        prop="goods_cat">
            <el-cascader v-model="addForm.goods_cat"
                         :options="catelist"
                         expand-trigger='hover'
                         :props="cateProps"
                         @change="handleChange">
            </el-cascader>
          </el-form-item>
        </el-tab-pane>
        <el-tab-pane label="商品参数"
                     name="1">
          <el-form-item v-for="item in manyTableData"
                        :key="item.attr_id"
                        :label="item.attr_name">
            <!-- 复选框 -->
            <el-checkbox-group v-model="item.attr_vals">
              <el-checkbox v-for="(cb , i) in item.attr_vals"
                           :key="i"
                           :label="cb"
                           border></el-checkbox>
            </el-checkbox-group>
          </el-form-item>
        </el-tab-pane>
        <el-tab-pane label="商品属性"
                     name="2">
          <el-form-item v-for="item in onlyTableData"
                        :key="item.attr_id"
                        :label="item.attr_name">
            <el-input v-model="item.attr_vals"></el-input>
          </el-form-item>
        </el-tab-pane>
        <el-tab-pane label="商品图片"
                     name="3">
          <!-- 上传文件 -->
          <el-upload :action="uploadURL"
                     :on-preview="handlePreview"
                     :on-remove="handleRemove"
                     :on-success="handleSuccess"
                     list-type="picture"
                     :headers="headerObj"
                     name="file">
            <el-button size="small"
                       type="primary">点击上传</el-button>
          </el-upload>
        </el-tab-pane>
        <el-tab-pane label="商品内容"
                     name="4">
          <quill-editor v-model="addForm.goods_introduce"></quill-editor>
          <el-button type="primary"
                     class="btnAdd"
                     @click="add">添加商品</el-button>
        </el-tab-pane>
      </el-tabs>
    </el-form>

    <!-- 图片预览弹框 -->
    <el-dialog title="图片预览"
               :visible.sync="previewVisible"
               width="50%">
      <img :src="previewPath"
           alt=""
           class="previeImg">
    </el-dialog>

  </el-card>

</template>

<script>
import _ from 'loadsh'

export default {
  data () {
    return {
      // 添加商品的表单数据对象
      activeIndex: 0,
      // 表单数据对象
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        // 商品所属的分类数组
        goods_cat: [],
        pics: [],
        attrs: [],
        goods_introduce: ''
      },
      // 表单数据验证规则
      addFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ],
        goods_cat: [
          { required: true, message: '请选择商品分类', trigger: 'blur' }
        ]
      },
      catelist: [],
      cateProps: {
        label: 'cat_name',
        value: 'cat_id',
        children: 'children'
      },
      // 静态属性数据
      manyTableData: [],
      // 动态参数数据
      onlyTableData: [],
      // 上传图片的URL地址
      uploadURL: 'http://122.51.249.55:5000/api/private/v1/upload',
      // 图片上传组件的headers请求头
      headerObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      // 预览地址
      previewPath: '',
      // 图片预览开关
      previewVisible: false
    }
  },
  created () {
    this.getCateList()
  },
  methods: {
    // 获取数据
    async getCateList () {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取数据失败')
      }
      this.catelist = res.data
      console.log(this.catelist)
    },
    // 级联选择器选中项变化，会触发这个函数
    handleChange () {
      console.log(this.addForm.goods_cat)
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    beforeTabLeave (activeName, oldActiveName) {
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请选择商品分类')
        return false
      }
    },
    async tabClicked () {
      console.log(this.activeIndex)
      // 证明访问的是动态参数面板
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`,
          {
            params: { sel: 'many' }
          })
        if (res.meta.status !== 200) {
          return this.$message.error('获取动态参数列表失败')
        }
        console.log(res.data)
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(',')
        })
        this.manyTableData = res.data
      } else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`,
          {
            params: { sel: 'many' }
          })
        if (res.meta.status !== 200) {
          return this.$message.error('获取动态参数列表失败')
        }
        console.log(res.data)
        this.onlyTableData = res.data
      }
    },
    // 图片上传
    handleSuccess (response) {
      console.log(response) // 服务器返回的数据信息
      // 1.图片信息
      const picInfo = { pic: response.data.tmp_path }
      // 2.将图片信息push 到 pics数组中
      this.addForm.pics.push(picInfo)
      console.log(this.addForm)
    },
    // 图片删除
    handleRemove (file) {
      // 获取江涛删除的图片临时路径
      const filePath = file.response.data.tmp_path
      // 从pics 数组中，找到这个图片对应的索引
      const i = this.addForm.pics.findIndex(x => x.pic === filePath)
      this.addForm.pics.splice(i, 1)
      console.log(this.addForm)
    },
    // 图片预览
    handlePreview (file) {
      console.log(file) // 点击的图片信息
      this.previewPath = file.response.data.url
      this.previewVisible = true
    },
    add () {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) {
          return this.$message.error('请填写必要的表单项')
        }
        // 加工整理数据
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        // 处理动态参数
        this.manyTableData.forEach(item => {
          const newInfo = { attr_id: item.attr_id, attr_value: item.attr_vals.join(',') }
          this.addForm.attrs.push(newInfo)
        })
        // 处理静态属性
        this.onlyTableData.forEach(item => {
          const newInfo = { attr_id: item.attr_id, attr_value: item.attr_vals }
          this.addForm.attrs.push(newInfo)
        })
        form.attrs = this.addForm.attrs
        console.log(form)

        // 发送请求添加商品
        const { data: res } = await this.$http.post('goods', form)
        console.log(res)
        if (res.meta.status !== 201) {
          return this.$message.error(res.meta.msg)
        }
        this.$message.success('添加成功')
        this.$router.push('/goods')
      })
    }

  },
  computed: {
    cateId () {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  }
}
</script>

<style scope lang="less">
.previeImg {
  width: 100%;
}

</style>
